1350–1400; Middle English < Latin scōria < Greek skōría, derivative of skôr dung
As the Romance languages are based on Latin, that would explain how the word is in both Spanish and Italian
I did not know this. I knew the word only as a type of volcanic rock that's used a lot in gardens and road construction. In metallurgy it's the slag or dross left behind after smelting.
Etymology is fascinating!
1350–1400; Middle English < Latin scōria < Greek skōría, derivative of skôr dung As the Romance
